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Exchange 2010 DAG quorum configuration question RRS feed

  • Question

  • We have setup Exchange 2010 recently with 2 DAG on 2 AD sites, each DAG has 3 nodes, Site A has 2 and Site B has the 3rd for DR. Site B has 2 also and the 3rd in Site A for DR, everything is working well so far but somehow Cluster Manager shows that Site B Quorum Configuration is in "Node Majority" and Site A Quorum Configuration is in "Node and File Share Majority". Also below, the alternate witness server is located in remote site, is that OK or NOT?

    From what I've read we do not need FSW because we have a 3 Node DAG, just curious why the quorum configuration differs.

    SITE A DAG01 Properties:

    AMB001 (mailbox server)

    AMB002 (mailbox server)

    AMB003 (mailbox server located in Site B for DR)

    Witness Server = AHUB001 (hub/cas server)

    Witness Directory = C:\FSW_DAG01

    Alternate Witness Server = BHUB0001 (hub/cas server in Site B)

    Alternante Witness Directory = C:\FSW2_DAG01

     

    SITE B DAG02 Properties:

    BMB001 (mailbox server)

    BMB002 (mailbox server)

    BMB003 (mailbox server located in Site A for DR)

    Witness Server = BHUB001 (hub/cas server)

    Witness Directory = C:\FSW_DAG02

    Alternate Witness Server = AHUB0001 (hub/cas server in Site A)

    Alternante Witness Directory = C:\FSW2_DAG02

     

    Thanks,

    Jonathan

    Wednesday, March 16, 2011 6:57 PM

Answers

  • The quote I provided above answers this question. 

    "run the Set-DatabaseAvailabilityGroup cmdlet with only the Identity parameter "

    such as: set-databaseavailabilitygroup -identity dag1



    Mike Crowley
    Check out My Blog!

    • Proposed as answer by Alan.Gim Wednesday, March 23, 2011 2:41 AM
    • Marked as answer by Alan.Gim Friday, March 25, 2011 6:42 AM
    Wednesday, March 23, 2011 1:18 AM

All replies

  • The way it's designed, the DAG doesn't use the FSW when it has an odd number of members.  I'm not sure what the indication you're seeing means.  Where do you see "Node Majority" or "Node and File Share Majority"?

    The purpose of the alternate FSW is in case you need it in a remote site, so, yes, it's appropriate that it's located there.

     


    Ed Crowley MVP "There are seldom good technological solutions to behavioral problems."
    Saturday, March 19, 2011 4:01 AM
  • I see it in Failover Cluster Manager in the Summary view of the DAG.
    Sunday, March 20, 2011 3:55 PM
  • What do you show in "Nodes"?
    Ed Crowley MVP "There are seldom good technological solutions to behavioral problems."
    Monday, March 21, 2011 2:59 PM
  • I see the 3 mailbox servers (BMB001, BMB002, BMB003 ) and their network connetions.
    Tuesday, March 22, 2011 12:16 AM
  • You may need to re-run the set-databaseavailability command.

    Note:

    The quorum model change should happen automatically. However, if the quorum model doesn't automatically change to the proper model, you can run the Set-DatabaseAvailabilityGroup cmdlet with only the Identity parameter to correct the quorum settings for the DAG.

    src: http://technet.microsoft.com/en-us/library/dd298065.aspx

     



    Mike Crowley
    Check out My Blog!

    • Proposed as answer by Mike Crowley Tuesday, March 22, 2011 3:32 AM
    Tuesday, March 22, 2011 3:30 AM
  • Mike,

    What exact command should I run? After the command, should it be in Node Majority or Node and File Share Majority.

    Thanks

    Jonathan

     

    Tuesday, March 22, 2011 2:45 PM
  • The quote I provided above answers this question. 

    "run the Set-DatabaseAvailabilityGroup cmdlet with only the Identity parameter "

    such as: set-databaseavailabilitygroup -identity dag1



    Mike Crowley
    Check out My Blog!

    • Proposed as answer by Alan.Gim Wednesday, March 23, 2011 2:41 AM
    • Marked as answer by Alan.Gim Friday, March 25, 2011 6:42 AM
    Wednesday, March 23, 2011 1:18 AM
  • Thanks, I'll try it later tonight.
    • Marked as answer by Jonathan F- Thursday, March 24, 2011 1:10 PM
    • Unmarked as answer by Jonathan F- Thursday, March 24, 2011 1:11 PM
    Wednesday, March 23, 2011 7:50 PM
  • Thanks, both shows as Node Majority now.

    JonathanF-

    Thursday, March 24, 2011 1:13 PM
  • Great!

    Mike Crowley
    Check out My Blog!

    Sunday, March 27, 2011 5:52 PM